diff options
Diffstat (limited to 'libavfilter/avf_showvolume.c')
-rw-r--r-- | libavfilter/avf_showvolume.c | 364 |
1 files changed, 364 insertions, 0 deletions
diff --git a/libavfilter/avf_showvolume.c b/libavfilter/avf_showvolume.c new file mode 100644 index 0000000000..897e5709b8 --- /dev/null +++ b/libavfilter/avf_showvolume.c @@ -0,0 +1,364 @@ +/* + * Copyright (c) 2015 Paul B Mahol + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/avstring.h" +#include "libavutil/channel_layout.h" +#include "libavutil/eval.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/opt.h" +#include "libavutil/parseutils.h" +#include "libavutil/xga_font_data.h" +#include "avfilter.h" +#include "formats.h" +#include "audio.h" +#include "video.h" +#include "internal.h" + +static const char *const var_names[] = { "VOLUME", "CHANNEL", "PEAK", NULL }; +enum { VAR_VOLUME, VAR_CHANNEL, VAR_PEAK, VAR_VARS_NB }; + +typedef struct ShowVolumeContext { + const AVClass *class; + int w, h; + int b; + double f; + AVRational frame_rate; + char *color; + int orientation; + int step; + + AVFrame *out; + AVExpr *c_expr; + int draw_text; + int draw_volume; + double *values; + uint32_t *color_lut; +} ShowVolumeContext; + +#define OFFSET(x) offsetof(ShowVolumeContext, x) +#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM + +static const AVOption showvolume_options[] = { + { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS }, + { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS }, + { "b", "set border width", OFFSET(b), AV_OPT_TYPE_INT, {.i64=1}, 0, 5, FLAGS }, + { "w", "set channel width", OFFSET(w), AV_OPT_TYPE_INT, {.i64=400}, 80, 8192, FLAGS }, + { "h", "set channel height", OFFSET(h), AV_OPT_TYPE_INT, {.i64=20}, 1, 900, FLAGS }, + { "f", "set fade", OFFSET(f), AV_OPT_TYPE_DOUBLE, {.dbl=0.95}, 0.001, 1, FLAGS }, + { "c", "set volume color expression", OFFSET(color), AV_OPT_TYPE_STRING, {.str="PEAK*255+floor((1-PEAK)*255)*256+0xff000000"}, 0, 0, FLAGS }, + { "t", "display channel names", OFFSET(draw_text), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS }, + { "v", "display volume value", OFFSET(draw_volume), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS }, + { "o", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "orientation" }, + { "h", "horizontal", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "orientation" }, + { "v", "vertical", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "orientation" }, + { "s", "set step size", OFFSET(step), AV_OPT_TYPE_INT, {.i64=0}, 0, 5, FLAGS }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(showvolume); + +static av_cold int init(AVFilterContext *ctx) +{ + ShowVolumeContext *s = ctx->priv; + int ret; + + if (s->color) { + ret = av_expr_parse(&s->c_expr, s->color, var_names, + NULL, NULL, NULL, NULL, 0, ctx); + if (ret < 0) + return ret; + } + + return 0; +} + +static int query_formats(AVFilterContext *ctx) +{ + AVFilterFormats *formats = NULL; + AVFilterChannelLayouts *layouts = NULL; + AVFilterLink *inlink = ctx->inputs[0]; + AVFilterLink *outlink = ctx->outputs[0]; + static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE }; + static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE }; + int ret; + + formats = ff_make_format_list(sample_fmts); + if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0) + return ret; + + layouts = ff_all_channel_counts(); + if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0) + return ret; + + formats = ff_all_samplerates(); + if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0) + return ret; + + formats = ff_make_format_list(pix_fmts); + if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0) + return ret; + + return 0; +} + +static int config_input(AVFilterLink *inlink) +{ + AVFilterContext *ctx = inlink->dst; + ShowVolumeContext *s = ctx->priv; + int nb_samples; + + nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5); + inlink->partial_buf_size = + inlink->min_samples = + inlink->max_samples = nb_samples; + s->values = av_calloc(inlink->channels * VAR_VARS_NB, sizeof(double)); + if (!s->values) + return AVERROR(ENOMEM); + + s->color_lut = av_calloc(s->w, sizeof(*s->color_lut) * inlink->channels); + if (!s->color_lut) + return AVERROR(ENOMEM); + + return 0; +} + +static int config_output(AVFilterLink *outlink) +{ + ShowVolumeContext *s = outlink->src->priv; + AVFilterLink *inlink = outlink->src->inputs[0]; + int ch; + + if (s->orientation) { + outlink->h = s->w; + outlink->w = s->h * inlink->channels + (inlink->channels - 1) * s->b; + } else { + outlink->w = s->w; + outlink->h = s->h * inlink->channels + (inlink->channels - 1) * s->b; + } + + outlink->sample_aspect_ratio = (AVRational){1,1}; + outlink->frame_rate = s->frame_rate; + + for (ch = 0; ch < inlink->channels; ch++) { + int i; + + for (i = 0; i < s->w; i++) { + float max = i / (float)(s->w - 1); + + s->values[ch * VAR_VARS_NB + VAR_PEAK] = max; + s->values[ch * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max); + s->values[ch * VAR_VARS_NB + VAR_CHANNEL] = ch; + s->color_lut[ch * s->w + i] = av_expr_eval(s->c_expr, &s->values[ch * VAR_VARS_NB], NULL); + } + } + + return 0; +} + +static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o) +{ + const uint8_t *font; + int font_height; + int i; + + font = avpriv_cga_font, font_height = 8; + + for (i = 0; txt[i]; i++) { + int char_y, mask; + + if (o) { + for (char_y = font_height - 1; char_y >= 0; char_y--) { + uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x * 4; + for (mask = 0x80; mask; mask >>= 1) { + if (font[txt[i] * font_height + font_height - 1 - char_y] & mask) + AV_WN32(&p[char_y * 4], ~AV_RN32(&p[char_y * 4])); + p += pic->linesize[0]; + } + } + } else { + uint8_t *p = pic->data[0] + y * pic->linesize[0] + (x + i * 8) * 4; + for (char_y = 0; char_y < font_height; char_y++) { + for (mask = 0x80; mask; mask >>= 1) { + if (font[txt[i] * font_height + char_y] & mask) + AV_WN32(p, ~AV_RN32(p)); + p += 4; + } + p += pic->linesize[0] - 8 * 4; + } + } + } +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *insamples) +{ + AVFilterContext *ctx = inlink->dst; + AVFilterLink *outlink = ctx->outputs[0]; + ShowVolumeContext *s = ctx->priv; + const int step = s->step; + int c, i, j, k; + AVFrame *out; + + if (!s->out || s->out->width != outlink->w || + s->out->height != outlink->h) { + av_frame_free(&s->out); + s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!s->out) { + av_frame_free(&insamples); + return AVERROR(ENOMEM); + } + + for (i = 0; i < outlink->h; i++) + memset(s->out->data[0] + i * s->out->linesize[0], 0, outlink->w * 4); + } + s->out->pts = insamples->pts; + + for (j = 0; j < outlink->h; j++) { + uint8_t *dst = s->out->data[0] + j * s->out->linesize[0]; + for (k = 0; k < outlink->w; k++) { + dst[k * 4 + 0] = FFMAX(dst[k * 4 + 0] * s->f, 0); + dst[k * 4 + 1] = FFMAX(dst[k * 4 + 1] * s->f, 0); + dst[k * 4 + 2] = FFMAX(dst[k * 4 + 2] * s->f, 0); + dst[k * 4 + 3] = FFMAX(dst[k * 4 + 3] * s->f, 0); + } + } + + if (s->orientation) { + for (c = 0; c < inlink->channels; c++) { + float *src = (float *)insamples->extended_data[c]; + uint32_t *lut = s->color_lut + s->w * c; + float max = 0; + + for (i = 0; i < insamples->nb_samples; i++) + max = FFMAX(max, src[i]); + + s->values[c * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max); + max = av_clipf(max, 0, 1); + + for (j = outlink->h - outlink->h * max; j < s->w; j++) { + uint8_t *dst = s->out->data[0] + j * s->out->linesize[0] + c * (s->b + s->h) * 4; + for (k = 0; k < s->h; k++) { + AV_WN32A(&dst[k * 4], lut[s->w - j - 1]); + if (j & step) + j += step; + } + } + + if (s->h >= 8 && s->draw_text) { + const char *channel_name = av_get_channel_name(av_channel_layout_extract_channel(insamples->channel_layout, c)); + if (!channel_name) + continue; + drawtext(s->out, c * (s->h + s->b) + (s->h - 10) / 2, outlink->h - 35, channel_name, 1); + } + } + } else { + for (c = 0; c < inlink->channels; c++) { + float *src = (float *)insamples->extended_data[c]; + uint32_t *lut = s->color_lut + s->w * c; + float max = 0; + + for (i = 0; i < insamples->nb_samples; i++) + max = FFMAX(max, src[i]); + + s->values[c * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max); + max = av_clipf(max, 0, 1); + + for (j = 0; j < s->h; j++) { + uint8_t *dst = s->out->data[0] + (c * s->h + c * s->b + j) * s->out->linesize[0]; + + for (k = 0; k < s->w * max; k++) { + AV_WN32A(dst + k * 4, lut[k]); + if (k & step) + k += step; + } + } + + if (s->h >= 8 && s->draw_text) { + const char *channel_name = av_get_channel_name(av_channel_layout_extract_channel(insamples->channel_layout, c)); + if (!channel_name) + continue; + drawtext(s->out, 2, c * (s->h + s->b) + (s->h - 8) / 2, channel_name, 0); + } + } + } + + av_frame_free(&insamples); + out = av_frame_clone(s->out); + if (!out) + return AVERROR(ENOMEM); + av_frame_make_writable(out); + + for (c = 0; c < inlink->channels && s->draw_volume; c++) { + char buf[16]; + if (s->orientation) { + if (s->h >= 8) { + snprintf(buf, sizeof(buf), "%.2f", s->values[c * VAR_VARS_NB + VAR_VOLUME]); + drawtext(out, c * (s->h + s->b) + (s->h - 8) / 2, 2, buf, 1); + } + } else { + if (s->h >= 8) { + snprintf(buf, sizeof(buf), "%.2f", s->values[c * VAR_VARS_NB + VAR_VOLUME]); + drawtext(out, FFMAX(0, s->w - 8 * (int)strlen(buf)), c * (s->h + s->b) + (s->h - 8) / 2, buf, 0); + } + } + } + + return ff_filter_frame(outlink, out); +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + ShowVolumeContext *s = ctx->priv; + + av_frame_free(&s->out); + av_expr_free(s->c_expr); + av_freep(&s->values); + av_freep(&s->color_lut); +} + +static const AVFilterPad showvolume_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .config_props = config_input, + .filter_frame = filter_frame, + }, + { NULL } +}; + +static const AVFilterPad showvolume_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_output, + }, + { NULL } +}; + +AVFilter ff_avf_showvolume = { + .name = "showvolume", + .description = NULL_IF_CONFIG_SMALL("Convert input audio volume to video output."), + .init = init, + .uninit = uninit, + .query_formats = query_formats, + .priv_size = sizeof(ShowVolumeContext), + .inputs = showvolume_inputs, + .outputs = showvolume_outputs, + .priv_class = &showvolume_class, +}; |